Phonograph-record die holder



5HON0GRAFH RECORD DIE HOLDER.

APPLICATION FILED IAN. I6, 1920.

QN ETE@ STATES.' PAjEN-r x eiericfeef To all who/m, it may concern:

'Be it known that I,'VVILHELM,B. BRON-Y ANDER,. a citizen of the United States, vand a resident of Montclair., Essex County, and State of New Jersey, have invented certain new and useful Improvements Ain Phono'- graph-Record DieIIolders,v of` which the following is a specification, reference being had to the accompanying drawings, forming a partthereof. i'

My invention relates .to phonography die holders and its object is tol provide a simple andelfectivezdevice for heating and cooling record disks during the process of` making them.KV Another object is to provide an apparatus by means of which the temperature of the material of which the disks are made may be changed, quickly but uniformly throughout its mass. In making records o f this character the material is pressed between dieswhile it is heatedto make it plastic andis cooled and hardened while held between` the dies under pressure. Inorder to produce perfect records, itis necessary that the mass be kept comparatively Ysoft vby maintaining it at a predeterminedtemperature which must be luniform throughout, until it 1s formed between the dies. It is then cooled- ;V and hardened before the ,pressure M1s removed This operationmay be accelerated by, artificial. cooling, but-inorder to 4be' effective the cooling must take place uniformly throughout the mass.r Consequently,l it is desirable to cool the formed records quickly' provided this can be ,accomplished` un1` formlyi By means ofthis invention this de sirable resultmay be attained.'

The aforesaid Vob'ects of the invention and f other; of its-objects andadvantages lwill appear-.in fthe following'r specification in ,which I ,will describethe invention, and the' novel features'o'f which will be set forthin appended:claims. A 1

drawings: l l

@Figure 1 is a front elevation' ofa 'press shownin outline with a pair of my diehold' i as shown inFigs.l 2. and v3. The second yrib ersthereon y Y c. v

` Flgrrre .Q -is asectional plan view of a die holder which is made according to and emsame device with a section taken on the linev Specification of Letters Patent. v

'holder of a modifiedconstrnction.

Figure 4 Vis an enlarged sectional elevation Patented Apryzs, 1922. f lippiieatviqi1 ,inea January 16, '1920. L serian No. 35i,s a oo Y VFigi 5 is a sectional ,elevation of vLike characters of reference `designate corresponding drawings.

l parts in'all the'gures of the 10 designates a press in' whichv 'll'is the` table and l2 the head. 7

QO'is a die or matrixholder at the corners of which are counterbored holes 21 for the reception of bolts bymeansofwhich it may' be secured to the table or head of the press.` The' die or matrix 22 issecured to thisholder by a ring 23 and screws 24. The. uppermost surface 0f the ring is' a distance above the matrix equal' to one-halffthe thicknessv o ff the finished record and this distance rieten@ .mines the thickness/of the record.' The up-v` per surface of the corners of thedie holder is flush with the top of the ring, but -the' holder is cut away as at 26 between itscor- Vner portions `toallow for the'escape of surplus record material, and it is also cut away at this same level 'inside ofthe corners to Vform a seatfor thering.'

rIhe part l27 of the holder upon whichA `the matrix rests isVv somewhathigher than the seat of they ring, and is comparatively thin,

Ifrom its under 'surface projects a plurality of concentric ribs 28. Theseincrease pro-V gressively in Vdepth vtoward the center :of the, l

holder where there isa hollowboss 291 BO isfa filler plate' the,"underfsurfaceof" which is vparallel with the upper surface '.of thepart'27 and thev npper surfacefof f which'ris beveled Vto fit tightly against the' ribs 28'. 3.1 isa gasket ring andthe plate 30V is heldinplace by spinning the-edges ofv the holder20 and of'the'boss 29 under it, as;

shownat 32 and 33respectivelyllr Any vother Y means for securing'the plate maybeusedif" desired.

34 is an inlet PlPHXd to .theholder-720,A

and this projectsjthrough the"y outer rib 28 is cut away at35 ata point diametrically opposite the intake pipe 34, `the'third rib'is take pipe. Theffourth' rib' is' cut away at 37. V'Ihe fth, sixth,severithand eighthribs are similarly' vcut away 'atl38, 39,40 'and 41 respectively, theinnerrib is` .cutaway at 42. 43 is anl outlet port from the space between the inner rib and the boss 29. A downwardly inclined bore 44 through plate 30 leads to a hole 45 in the holder 2O with which is connected a discharge pipe 46. 47 is a heat insulating lining in the bore 44.

Before specifically describing the structure shown in F ig. 5, l will point out the manner in which this device is used. lilith a pair of these die holders affixed to the table l1 and the head l2 of the press, as shown in igure l, and with a matrix secured to each of the holders steam is admitted through the inlet pipe 34 and allowed toescape through the outlet pipe 46. rl`he path of the steam is shown by the arrows in Figure 2 from which it may be seen that the steam is uniformly distrib-l uted throughout the body of the holder so that it is uniformly heated.

lVhen inv this condition, the heated record material in its plastic condition is placed upon the lower dieholder and the two die holders are brought together under pressure. As has been pointed out surplus material may escape through the openings formed by the parts 26 of the holders. ln this manner the record is formed. lVhile thus held under pressure, steam is shut off and cold water introduced through the pipe 34 and allowed to escape through the pipe 46 after passing through the tortuous passages formed in the holder between ribs 28.

By this arrangement of the parts the tem-V ribs and the relative beveled upper surface of the plate 30 provide for aquick drainage of the water or of the condensed steam, and it is for the same purpose of accelerating the` action of the device that the bore 44 is also inclined. It is obvious that the die holdersand the material between them can be quickly cooled and also that the die holders and matrices may be as quickly re- 1 heated after the record has been removed in rial is interposed between it and the filling plate 30A.

' have illustrated and described different i forms of construction in order to show that fluids connected with the outermost part of'y said passage, and a downwardly inclined outlet passage from the center ofthe devicev 4to a point opposite the inlet port.I

2. A die holder having a portion with surface adapted to hold a matrix, a plurality of concentric spaced ribs depending from the side of said portion opposite the matrix holding surface, a poltion of each rib being cut away at a pointremoved from the cut away portions of adjacent ribs to forma tortuous fluid passage, a. filler plate abutting against the ribs, an inlet port adapted toV introduce heating and cooling'` fluids connected with the outermost part of said passage, and an outlet port leading to a point d iametrically opposite said inlet-port.

3. A die holder having a portion with a surface, adapted to hold a matrix, a plural ity of concentric spaced ribs depending from the side of said portion opposite the matrix holding surface, a portion of each rib being cut away ata point diametrically opposite the cut away .portions of adjacent ribs to form aA tortuous fiuid passage, a ller plate abutting against the ribs, an inlet port adapted to introduce' heating and cooling fluids l connected with the outermost part ofsaid passage, and anfloutlet port leading to a point diametricallyopposite said'inlet Dort. 1

14. A die holder; havingy 'a portion with a surface adapted'to holda matrix, a plurality of concentric spaced ribs ydepending from the side of said portion opposite the matrix holding surface, a portion of each rib being cut away at a point removed from the cut awayk portions of adjacent ribs to form a tortuous fluid passage, said ribs progressively increasing in depthtoward the center of thevdevice, a filler plate abutting against theribs, an inlet port adapted vto introduce heating and cooling fluids connected with the outermost part of saidpass'age, and an outlet portlleadingtoa point diametrically opposite said inlet port. f 5. A die holder having a portion with 'a surface adapted to hold a matrix, a plurality of concentric spaced ribs depending from the side of said portion opposite the matrix holding surface, a portion of each ribbeing cut away'at a point diametrically opposite the cut away portions of adjacent ribsto form a tortuous fluid passage, said ribs progressively increasing in depth toward the center of the device, la filler plate abutting against the ribs, an inlet port adapted to introduce heating and cooling fluids connected with the outermost part of said passage, and an outlet port leading to a point diametrica-lly opposite said inlet port.

6. A die holder having a portion with a surface adapted to hold a matrix, a plurality of concentric spaced ribs depending from the side of said portion oppositeA theY matrix holdingsurface, a portion of each rib being cut away at a point removed from the cut away portions of adjacent ribs to forma tortuous fluid passage, a filler plate abutting against the ribs, an inlet port adapted to introduce heating and cooling fluids connected with the outermost part of saidY passage, andan outlet passage from the center of the device toa point opposite the inlet ort. 'v 13.7. A die holder having a portion with a surface adapted to hold a matrix, a plurality of concentric spaced ribs depending from the side of said portion opposite the matrix holding surface, a portion of each rib being cut awa-y at a point removed from the cutV away portions of adjacent ribs to form a tortuous fluid passage, said ribs progressively increasing in depth toward the center of thel device, a filler plate abutting against the ribs, an inlet port adapted to introduce heating and cooling, fluids connected vwith the outermost part of said passage, and-a downcenter of the device to a inlet ort. p A

8. die holder having a portion -with a surface adapted to hold a matrix, a plurality wardly inclined'outlet passage from ,theA pointl oppos1te, the

of concentricv spaced ribs depending from the: Y

vside'of said portion opposite the matrix holding surface, a portion of each rib being cut away at a point diametrically opposite theV out away portions of adjacentribs to form a tortuous fluid passage, said ribs progressively increasing in deptli toward the centreY ofthe device, a filler plate abutting against'V the ribs, an inlet port adapted to introduce heating andv cooling fluids connected with the outermost part of said passage, and a downwardly inclinedv outlet passage from ythe center of the device toa point opposite the inlet port.

rib being cut away at a point removed `from the cut away portionsv of adjacentA ribs to ,y

form a tortuous fluid passage, an inlet port adapted to introduce heating and cooling fluids connectedwith the outermost part ofy said passage, and an outlet passage from Vthe innermost part of thepassage.

In witness whereof, -I hereunto setrmy l hand this 12th day of January 1920.

Y i WILHELM B. BRONANDER. 

